G'day. I have looked into this a little. There are a couple of options available. One is a 'Stealth cam' setup, it clamps to the rifle/bow/helmet etc. There is also a "scope" with built in video. I'll get some more details posted later. (No time just now.)
If you're not confused, you're not trying hard enough!
When you're confused, I'll try to use smaller words!!!